Tight-loose wrap mechanism



Angl.' 14,1945. T. 'JENSEN' 382,426 A lTIG'I''LVOOSE WRAP MECHANICS I s I.

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Y- INVENTQR .THORMOUQENSEN T. JENSEN 2,382,420v4 Tmawmosn wm uncmmsu" v Filed'ocn' 8, 194:5' 4 sheets-sheet 2 INVENTOR THoRMoD JENSEN i Aug. 14, 1945.

@QN @Sv Aug. 14, 1945'. T. JENSEN? TIGHT-LOOSE W111i?MHCHANISMq Filgd roct. 8', 194:5 l 4 shets-sneet 4 i mmm Patented ug. 14, 1945 Ulsux'rraoJ STAT -frIGn'r-LoosE WRAP MEoHANIsM 'llhcprmod Jensen, Laurelton; N. Y1, assig'nor to`rv AmericanMachine and Foundry corporation of iNew Jersey l Applicationombe s 1943,11StlloMsoSgiss Y )18 Claims. (orcs-2) This invention relates to wrapping machines, and especially to types of wrapping machines in which either a wrapper sheetor -a wrapper in the form of an endlessweb'is draped in the path of movement ofy an article onto a lifterI table or conveyor, such that due to the movement of the article against the Wrapper onto the. liftertable the article is partially enwrappedwith aportion vof fthe wrapper or ,wrapper web, extending un-4 folded relative to the article. -In Wrappingfrna-` chines of this type it Visx-especially desirable-that the `Wrapper beyploperlyV disposed .circumferentially about each article beingwrapped and `that the relative tightness or Ylooseness of thewrapper can be controlled according `to the desires of any particular manufacturer, l t 'r 1 It is, therefore, an object5of` my inventionto provide an improved' device for controlling the :feed of wrapping material' either inv `wrapper sheet or endless web form so asy to enable `the attendant of the machine to so control the cirf cumferential envelopment, of a wrappernabout an article that the packageproducedj may Vbe characterized as, f tightly wrapped, average Wrapped or looselyfwrapped. ,l

The inventiondescribed hereinafter is ofA general application for Wrapping machines,- although it has particular'referencewto `machines of Vthe general type disclosed ini'Schmitty patent, No.

1,851,295, issued March 27, `1932, in which an article is` forced against a draped wrapper web onto a lifter table andthence .transportedwto folding instrumentalities. ,4 l

It is a further object of myfinvention tofprovide mechanism for impartingtofthe conveyor or lifter ttable which transfers w apartially Wrapped article `from an infeed station-toa de'- livery station-located generally above the'infeed station an over-travell of the lifter table relative to the delivery station such that when taken in connection with wrapper"controlling and V1hold'- illustrated connection With a `bread wrappingfnjlachine, E 5K5 Company, 'a

that itsusefiihiess, is not. limited thereto and may be usedwithany,` type of `Wrapping machine.` i Othenobjectsofiny invention will be setforth in thefollowingdescription `and drawings which illustrate `preferred embodiments, thereof, it rbeing understood thatn tneabowe j statement ,off the.v 1

obiectsof my invention is intended generally to explain the samewithoutlimiting itin any mane; ner.

part of this sper:ication,A and wherein ,the .sev-

eral reference l charaeters"h designate the same; or.

like elements:

i11pstratmg. the `nove; "tight-loose,` Ywrap mecha,- nism in combination. vvithna.` lifter `table `of a bread wrapping.xriachinm` Figure `2is `plan viewof the same;

, :rieure 3f `is an and .clayettes mastratihg the adjustable cainlwhichcontrols the relative tight-` ness of `a wrappingabout an article;l i

. i, Figure 4 isa partial sicleelevation otgthe sam takenonline '47| of Figure Y,3; .f

- wrap.

,.In the pnrposes of illustrationas shown in*A `Ilfi-gi11je`s land .2, a lifter table 2Q, which maybelof .the general typevdisi Closed in the @hre .rferel to Schmitt patent,

is` mounted "pivotal rnoverijientA cna shaft 22 and `is constrained. to move'betvveen an larticle infeedposition adjacent an inieed runway 24 and anartvle deliverypostohfadiacent adelv.-

`err Station and, `f oltiii'artlwhich is provided with thev usual end "folders and :sealers 26a',` 2Gb.

lathe illustrated .embedimat lifter table 2.0 consists of `a pivoted fifax'ne 28 `which supports a plate 30.` As menticii'edhereiabove; frame 28 is swingably' mounted'onshaft 22 supportedin side frames 32 of the'wra'pping machine; Lifter table 2D' is'op'erated-y in 'timed rela'tion with`the several functioning: parts of the Wrapping'ma'- chine by means 015` an-` adjustable connecting rod 34 having-one :end connected at 35to 4frame 28. The other fend; of--.the rconnecting t rodl `34` is con -nected to `an 3am .36 ot a flever.. loosely mounted on shafty 38 suitably` supported inside frames. 32. The other am; to cf thelever isprovidedwith-a camiollower. 42,tracking,a.cam.44 mounted on a camshaft '46. supported by hearings (not shown) in the side frames. 3,2andgdriven-py means of .a

`the wrapping operation. vswings bridge plate |08 into openposition relafor-'the next article to be wrapped. Following the operation of the lapl roller H8,` plate 50 is retracted tothe position shown in Figure 9 where it serves as a shear plate'for knife |20, which is also constructed and operated yinthe same man- Aner, as disclosed in the Schmitt patent; to'cut the wrapper'from web W (Figure 10). Clamp plate 50 is moved to its inoperative position by means of cam 88 and coacting lever 84, arm '|2, rod"| and bracket. Springl |4 on shaft 54 (Figure 2,) causes arm 52 mounting vplate 50 to swing upwardly faway from plate |02 a distancetgovverned bythe position of an adjustable stop screw ||6 (Figures 1 and 9). s

Cam |62 is provided with a low portion |63 by means of which through lever |52 and spring |56 it maintains rollers |06, ||0 in clamping engagement during the operation of lap rol1er'||8 and knife` |20. Cam |62 also has an intermediate high portion |65 which causes bridge plate |08 and roller |06 to swinga slight distance away from roller ||0 after the cuttingoperation to release the cut end of the web. As the movement of a partially wrapped article and itsfwrapper from table 30 continues,` rollers |06, ||0iact as `guide rollers, and have substantially no clamping action on the unfolded end of the Wrapper passing therebetween upwardly against the bottom of the article as it moves onto bridgeplate |08, along foldway 26 and between conventional folding and sealing mem-bers 26a, 26h to complete A high'` portion |61 tive to roller |06. In this manner the excess `Wrapper is disposed loosely about an article an a loose wrapped package results. i f' In order to further control the degree of looseness of Wrapping, the cam-44 effecting the` movement of the` lifter table 20, is provided with ran adjustable cam portion |22 (Figuresil, 3, 4 and 45), byimeans of which the amount of overtravel of the lifter tableand thereby the amount 1of additional wrapping material-pulled1is ,icon- 'inactiveplater 50fto' cut a wrapper from WebWyas In forming' tight wrapped packages( `cam `portion `|221 is adjustedfrelativeto cam 44sothat its l *"The invention above described may be varied in trolled. lCam portion |22 :is loosely Cmounted on 3a stud- |24 carried by the cam `4,4 andris equipped with a slot-| 26 (Figures 3 and-i) of suitablelength y `which engages with an eccentric portion |28 of a stud |30 carrying a knob |32.l `StudiV |30; is loosely supportedby the cam 44 and has; athreaded portion |34 which engages with la lockenut |36. `ly loosening the latter and turning knob `|32 the camportion |22 can 4be setin such away as ,to be movedy above the cam surface of cam 44 or .te be flush with the same. since this portieri of .the cam controls the over-travel.` of lifter `table 20, looseness of any degree canbe effected,- In

finger (Figure 5) which may beY operated in conjunction with a scale .|624 secured to cam 414.

construction within the-scopeof `theclaiinsl for the particular device,1 1 selected to illustrate the Tinver'itiomis ibut 'one vof many possible concrete embodiments 'of the same. Itis not, therefore, to `be restricted totheprecise details of the structure *shown and described; y 1 "What is claimed is'r;`- f il 1.*In iaiwrappingilmachine having an4 .infeed guideway, Fan? articlef'foldway located in'a plane spaced `fronifsaid guidew'ay," 'an article conveyor 4mo'v'ablebetween said guideway" and said foldway, andrneans `for movingan article from said vguideway onto said' conveyorla'gainsta wrapper posif-t'ion'ed'I ato 1 receive said 'articl'e to effect? `partial enwrapping oflsa'id article with an unfolded por- 'tionof said 'wrapper extending outwardlyf beyond said article; mechanismfor Vmovingsaid conveyor :from-said `guidct'va'yA `toa I position beyond the `planar-limits'bflsaidfoldway, means forholding a portion rof said wrapper extending beyond said article While said conveyor occupiessaid position,4

and means comprsinga" partfsaid mechanism ffo moving saidf'conve'yor into Tsubstantialalign- 'me'nt with said lf'oldwayi for A"causing said wrapper 'ftobe looselyiwrapped about saidarticle.`

2;' In azjwrapping' machine havingan i'nfeed .guidewayL-an article.foldway rlocated ini a plane -spacedf Afrom*1saidg'uideway,` ani article conveyor movable "betweenrf'said guideway and said fold- 'way, andiirieansforfmoving an article from `said .fguideway onto said iconveyor i against a' wrapper Apositioned to 'receive said "article t'o effect partial e'nwrapping of'sai'darticle with an'unfolded porstion` `of saidwrappr extending iutwardly beyond said "article",l mechanism for moving" s'aid conveyor l :ffroni 'saidi'guideway' to "ay position'` beyond' "the CTI In case a normal wrapv is desiredcam |22.is

`moved so that its operative face is fiushwith the face of cam 44 thereby limiting movement of table 30 into the plane of guideway 26 The attendant can throw the hand Alever `1a .in inedirection of the arrow in Figure l, which due to a different position` of pin 82 on controlcam: 80 causes vplate 50 to. remain in afretracted positionas indicated inv dotted lines` 50a of Figure 1, with the result that the web W is not clamped during wrapping operation and the'wrapperiis pulled tightly aroundvsaid article. Invforming normal wrapped packages, rollers |06, ||0 are "operated to clamp the paper during theoperation of uieiap roiier'ils, and knife |20 eoacts with 'planar' limits of saidifoldway'fmeans for holdingV aportion'` of lsaid'iwrapper"extending1 beyond said articlewhile saidiconveyoroccupies saidy position,

'means comprising apart `:o f said mechanism `for 'moving isaid conveyoriintd substantial alignment wrapper* about said"a-rticle,`y and a device: associated Awithsaid last-namedrneansfor controlling `the degree of looseness 'of la: wrapperabout i an 3.v Inawrappingy inachine having an infed guidefan article yfoldway positioned aplane spaced from said guideway, an article-conveyor provided i witli'an article supporting surface' movable betweensaid guidewayandsaid foldway, and

means for moving an article from said guideway onto said surface againsta wrapperpositione'd to` receive saidfartile to effect partial enwrapping ofsaid'article in saidw'rapp'er with a portion of theI` wrapper extending outwardly beyond 'said article;` mechanisrn'fr' moving'said` conveyor article toy control the tightness' porting surfacefbeyond the planar limits ofsaid foldway, means for holdingqal-part of sadzplojecting'portion' ofrsaidwra-pper substantiallyrvervl`tical relative to .onevfaceoi said'artcle. while said surface occupies said px'i'sitiolrr,` land means form.- ingE apart of :said mechanism 'Yfor-l vmoving said article' from said surface-'onto said-:foldway'for .causing Asaid wrapper lio-loosen relative'ftlo said of 4'said wrapper relativeto said particle.

. .$4.113 .a Wrapping" machine v havingv `an'v inieed guide, an art-iclefoldw-ay positioned `in afplane 'sp'acedffrom said` guideway," an article conveyor provided. with an article supporting surface movable between said 'guideway and saidfoldway, and mea-ns 'fori moving an1 article from said guideway 4ontosaid surface'l against awrapper positioned to `receive said .article toeffect-partial enwrdpping of said article in said wrapperwithsaportionof the wrapper extending outwardly beyondsaid article;`

me'chanism yfor :moving 'said conveyor Avertically 'from -articlereceivi-ng position adiacent lsaid g-uideW-ay and positioningA said article supporting Vsuriace beyond the planar limits of said midway, meansfon saidconveyor forV holding4 a port-ion of said wrapper substantially verticalrelative to lone face ofwsaid article While said,V surfacey occupies said fpositlon; and' means forming a part or said V meolianis rnfor moving said conveyor inV a Areverse direction and, positiorling` said` surfaceY ini the plane of said foldway prior to-theremoval of said `article' from said suria'ceontosaid foldwvof'V for causingsaid-Wrapper ton becomeloosened relative A to said article to control the "tightness offsaid and moans' or moving an article `'fromx said guide- Way onto Said surfaceagainsta wrappe'rposis tionedto receive said article' to 'effect partial enwrapping of said article in said wrapper'with aliporti'on fof the" wrapper extending 'outwardly beyondPv said article; `mechanism for moving said conveyor vertically from article receiving'positio'n l adjacent L saidv guidewayv and 'positioning' said ar- .tiole supporting" surface beyond-the planar limits of 'said' foltlwail. a stationaryWrapper'` guiding and clan'lpingv member; means` ony said conveyoreoact ing'withI said member -forfholding a; portion of saidwrapper-substantially relative to one face of said-article-whigle said surface onfsaid conveyor "occupies said position-,and means forming a part of-I said-mechanism for moving said-.conveyorand n `P'.Stio'nirxg said surface-in the plane of 'said foldlway-prior to the removal-of said-article from said surface onto said foldway for causing said'wrapii per. to loecomevk loosev relative to--said article to control the tightness ofy saidwranper relative-'to '6.- In awrappingmachine` having anv lnfeed o fguide; an article foldwaylocated in a plane spaced Afrom said guidewaman article conveyor provided lwith anartiele' supporting surface movable betweeny `saidguidewayand. said foldway; andmeans `for-moving an article from said guideway `onto said surface against# a-wrapperpositioned to re."-

eeivel said article to eiectn partial enwrappln'gv of lsaid articlerin said wrapper with afportion of the Wrapper extending outwardly beyond said; ar,-

yassaiao said surface in ,substantialalignment 'with said foldway= to` cause said'wrapper to bow relative -tosaidface' 'ofsai'd article whilei said Wrapper is held by said means as aresult ofthe reverse movementof said'conveyor. f'

'7. Inza lwrapping machine having'an infeed guicleway, an article "fdldwaylocated 'in al plane 'spaced from said 'guidewam anl article' conveyor `movableloetween said guidwayfand 'said fold- 'way,1and means forrmovi'n'gan article from' said guideway onto saictconveyor` against a 'wrapper 'positioned toY receive `saidart'cle to effect partial enwrappingf'of s'aid article with: an 'unfolded 'portion of-Ysaid' wrapper extending outwardly beyond said articlepmechanism' formmov'i'ng said conveyori'rom'said rg'uidew'ay'"to a position beyond the planar limits'ofsaid-foldvvayfrneansffor hol'ding a portion of said-'wrapper extending 'beyond said article' while`said vco'ni'feym* occupies' said position, means comprising" ya'fpart'of "said" mechanism lfor'moving said co'n'vex'for'tor substantial alignment with-"said foldway Vffor causing 'said "wrapper to loosen Arelative toi said' article' l tl'lereloy provide' a loose wrap, andin'eans operative upon movement of said conveyor into sursis noelv alignment with said fvoldway for clamping said` bowed'wrap`per.

'8. -In a 'Wrapping machine having "an infeed guideway, an `article"ioldway located inv'xa plane 'spaced from 'said g'uideway,l an article/conveyor movable betweensaidnguidewayand said'foi'qw'ay, and means'for moving 'afarticle "from js'aid guider way onto's'aid conveyor against' a wrapperfp'ositioned 15o-'receive said 'article' toeffect partial enwrapping or "'saidj" 'article' 'with' an unfolded portion. vof said jwrapperfextending *outvv'ardlyv beyond said articlo,` mechanism formoving said conveyor from said; guidevvayllto v a position j'e'yoridthe planar limits l or said r'ql'dwy; 'means 'for' holding afportion i of 1 saidy 4wrapper 'extending beyond said article vwliil'e said conveyor occupies said'position, means' comprisngapart of said mechanism for1 moving saldiconveyor in to'" substantial alignment with said foldvvay 'for causing said wrapper to bow outwardly eyondisaid article tort'h'ereby provide a loosewrapf clamp member carried by said `conveyor'j"a"`coa`c fhgV clamp member yspaced Vfrom.'said'"first-ina d mrnberzuanfmeans for 9 n a wrapping* machine; havlng"an"lnfeed guide, an article foldvvayflfocated lin a plane vspaced [said surfacewagainstia wrappcrpositioned yto receive .said article to eiiectpartial envvrapping 'of said articlein saidwrapper with a portion of the 'wrapper extendingk outwardly beyond'said aryticle;4 'mechanism forffmoving said` conveyor verticallyjffrom article receiving position adjacent said-guideway andfpositioning said article supportingA surface :beyond the planarlimits of said 4lioldway, means `fort holding said projecting porratsam ,tion .i of v said Wrapper -substantially verticalmelaf tiverto oneffacewof said article Z'while saidsurface yon `said conveyoroccupiesaeaidf IJQsition-- said mechanism comprising a f Cem operative :to fmQve said conveyor in a reverse direction ,torposition a said surface in Asubstantial alignment; with said foldway to cause saidwrapperttoybomoutwardly relativeto saidfaceof said article whilegsaid wrap? per ist held by saldi means)V asf. a, result .of` ,the re=` verse movement ofsaid conveyor; and adjustable i means on said cam for controlling` the limits of movement ofsaid-,conveyor relative to said foldway.

10. In a wrapping machine having a lifter table movable between an article receiving and an article delivering station, a delivery guide located proximate said delivery station, and means for feeding articles in succession onto said table and against wrappers positioned in the path of movement of said articles to partially enwrap each article and leave a portion of the wrapper extending beyond the article, mechanism for moving said lifter table and partially enwrapped article to a position above and out of alignment with said delivery guid, a device for holding a portion of the outwardly extending wrapper, and means for effecting relative movement between said device and lifter table for feeding a portion of said extended `wrapper vertically upward to loosen said wrapper relativeto said article being wrapped. l 11. In a wrapping machine having a lifter table movable between an article receiving and an article delivery station, a delivery guide located proximate said delivery station and means for feeding articles in succession onto said table and against wrappers positioned in |the path of movement of said articles to partially enwrapI each article and leave a portion of the wrapper extending beyond the article, mechanism for moving said lifter table and partially enwrapped article to a position above and out of alignment with said delivery guide, a device for holding a portion of the outwardly extending wrapper, means for effecting relative movement between said device and lifter table for feeding a portion of said extended wrapper vertically upward to loosen said wrapper relative to said article being wrapped, and adjustable means for limiting the movement of said table relative to said delivery guide, said adjustable means being constructed and arranged to govern the relative tightness of a `wrapper abowt an article. a

12. Tight-loose wrapper control mechanism for a wrapping machine having means for moving partially wrapped articles along a delivery guide, comprising a lifter table for lifting partially wrapped articles from an infeed guide to a deliva ery guide, said articles having an unfolded portion of a wrapper extending from an article, a wrapper clamping member located adjacent the patlr of movement of said table, avcoacting clamping member carried by said table, and means for effecting relative vertical movement between said table and clamping memberafter said wrapper is clamped to eiect vertical movement of said clamped portion of said wrapper relative to said article being wrapped and form a loosely wrapped article.

13. Tight-loose wrapper control mechanism for a wrapping machine having means for moving partially wrapped articles along a delivery guide, comprising a lifter table for lifting partially wrapped articles fromI an infeed guide to a-delivery guidasaieerticles hai/ieee aefoleedeortieeei wrapeergteiidipair p d ar icles along a delivery guide, comprising a lifter table for lifting partially wrapped articles from an infeed guide to a delivery guide, said articles having an unfolded portion ofa wrapper extending from an article, a wrapper clampingmemberlocated adjacent the path of movement of said table, a coacting clamping member carried by said table, means for effecting relative vertical movement between said table and clamping members to effect vertical movement of said clamped portion of said Wrapper relative to said article being wrapped, and means for controlling the operation of said clamping member on said table for varying the vertical displacement of said wrapper.

15. Tight-loose wrapper control mechanism for a wrapping machine having means for moving partially wrapped articles along a. delivery guide comprising a lifter table for lifting partially wrapped articles from an infeed guide to a delivery guide, said articles having an unfolded portion of a wrapper extending from an article, a Wrapper clamping member provided with a `resilient clamping surface located adjacent the path of movement of said table, a coacting clamp ing member carried by said table, and means for effecting relative vertical movement between said table and clamping members after said wrapper vis clamped to eifect vertical movement lof said clamped portion of said wrapper relative to said article being wrapped. i

16. Tight-loose wrapper control mechanism for a wrapping machine having means for moving partially wrapped articles along a delivery guide comprising a lifter table for lifting partially wrapped articles from an infeed guide to a delivery guide, said articles having an unfolded portion of a wrapper extending from an article, a wrapper clamping member provided with a resilient clamping surface located adjacent the path of movement of said table, a'coacting clamping member carried by said table, and mechanism for effecting relative movement between said table and clamping members to effect vertical movement of said clamped portion of said wrapper relative to said article being wrapped, said last-named mechanism including means for effecting swinging movement of said clamping member on said table while said portion of said wrapper is clamped.

17. Tight-loose wrapper control mechanism for a wrapping machine having means for moving partially wrapped articles along a delivery guide,

, comprising a lifter table for lifting partially wrapped articlesl from an infeed guide to a delivery guide, said articles having an unfolded portion of a wrapper extending from an article, a. wrapper clamping member located adjacent the path of movement of said table, a coacting clamping member carried by said table, means for effecting relative vertical movement between said table f and clamping members to effect vertical movement of said clamped portion of said wrapper 

